Keratitis is defined as a condition where the cornea of the eye becomes inflamed. This book on keratitis discusses diagnosis and treatment methods for keratitis. Acute keratitis may result in the scarring of the cornea, perforation of the cornea or even eye loss. Infectious keratitis must be treated rapidly and requires antibacterial, antifungal or antiviral therapy. This book is a compilation of chapters that discuss the most vital concepts and emerging trends in this field. It aims to shed light on some of the unexplored aspects of keratitis and the recent researches in this area. This book will serve as a reference to a board spectrum of readers such as researchers, students, ophthalmogists, etc. In this book, using case studies and examples, constant effort has been made to make the understanding of difficult concepts of keratitis as easy and informative as possible for the readers.